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Vishay General Semiconductor - Diodes Division 1.5KA20AHE3/73
- Part No.:
- 1.5KA20AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA20AHE3/73.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:4,070
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Product details
Overview
1.5KA20AHE3/73 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at ≤27.7 V under 54.2 A surge current, and operates up to +185 °C junction temperature - enabling reliable protection of MOSFETs, sensor signal lines, and ICs in automotive powertrain and body electronics.
For engineers reviewing the 1.5KA20AHE3/73 datasheet, 1.5KA20AHE3/73 pinout, 1.5KA20AHE3/73 application, or 1.5KA20AHE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, 19.0–21.0 V breakdown range, 17.1 V stand-off voltage, 1.0 µA max leakage at VWM, and low 0.090 %/°C VBR temperature coefficient - critical for stable clamping across wide thermal operating ranges.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for high reliability under repetitive surge stress and elevated temperature conditions. Its unidirectional polarity and low incremental surge resistance ensure fast response (<1 ns) and minimal clamping overshoot during inductive load switching transients.
The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and maintains stable electrical characteristics from –65 °C to +185 °C, with RoHS-compliant matte tin-plated leads qualified per JESD201 Class 2 whisker test and solderable per J-STD-002/JESD22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or ISO 7637-2 pulse 5a scenarios |
| Breakdown Voltage (VBR) | 19.0–21.0 V at 1.0 mA - defines precise clamping onset threshold for 24 V system protection |
| Stand-off Voltage (VWM) | 17.1 V - ensures no conduction during normal 24 V rail operation, minimizing standby leakage |
| Max Clamping Voltage (VC) | 27.7 V at 54.2 A - limits protected circuit voltage to safe levels during worst-case surge events |
| Junction Temperature Range | –65 °C to +185 °C - supports under-hood deployment in engine control units and transmission modules |
| AEC-Q101 Qualification | Qualified - meets automotive reliability requirements for temperature cycling, HTRB, and surge endurance |
| Leakage Current (ID) | ≤1.0 µA at 17.1 V - prevents excessive power loss in always-on vehicle networks |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 rating; matte tin-plated axial leads (0.038–0.042" diameter); cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to ground or lower-potential node in unidirectional TVS configuration |
| Cathode | Current exit terminal in forward bias; marked with color band | Connected to protected line (e.g., CAN_H, LIN, sensor supply) - conducts surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent surge performance and long-term stability under thermal cycling and repeated transients |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a energy requirements for 24 V automotive systems |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including HTGB, H3TRB, and surge lifetime testing per JEDEC standards |
| Low VBR tempco (0.090 %/°C) | Minimizes clamping voltage drift across –40 °C to +125 °C ambient, ensuring predictable protection margin |
| Solderability & whisker resistance | Matte tin leads pass JESD201 Class 2 whisker test and J-STD-002 solderability standard |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protection of microcontroller I/O and power supply inputs against load-dump transients and alternator ripple in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 24 V supply rail and ground, shunting surge energy before it reaches downstream regulators and logic. Use Value: Withstands 1500 W surges and operates up to +185 °C, enabling direct placement near high-temperature power stages without derating. |
Use Scenario: Safeguarding RS-485 communication lines and gate drivers in variable-frequency drives exposed to motor back-EMF and contactor switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on differential bus lines, conducting only during >17.1 V transients while remaining invisible during normal 12–24 V operation. Use Value: 1.0 µA leakage at VWM preserves signal integrity and reduces quiescent power draw in always-active industrial networks. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Input |
Use Scenario: Shielding LIN bus transceivers and LED driver ICs from ESD and relay-switching spikes in door modules and lighting controllers. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS mounted directly at connector entry points to intercept fast transients before propagation into sensitive analog front-ends. Use Value: Sub-1 ns response time and 27.7 V clamping limit ensure LIN signal edges remain intact and MCU GPIOs stay within absolute maximum ratings. |
Use Scenario: Front-end protection of AC/DC power supplies in telecom base stations subjected to lightning-induced surges on primary input lines. IC Role / Device Role / Timing Role: Primary-stage TVS in series with MOVs, absorbing initial high-voltage spike energy before secondary suppression stages engage. Use Value: 200 A peak forward surge rating allows coordination with upstream fuses and enables robust multi-pulse endurance in outdoor-installed equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20AHE3/52 | Same VBR range (19.0–21.0 V), but 600 W PPPM rating and SMB package - lower surge capacity, surface-mount only | Preferred for space-constrained PCBs where 600 W suffices; not suitable for high-energy load-dump scenarios | Select when board area is limited and surge threat level is moderate (e.g., infotainment vs. powertrain) |
| 1.5KE20A | Same 1500 W rating and axial 1.5K case, but commercial-grade (non-AEC-Q101), 200 °C max TJ, and higher leakage (5.0 µA) | Lacks automotive qualification; acceptable for industrial controls but not for safety-critical vehicle subsystems | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMBJ20AHE3/52 and 1.5KE20A, the 1.5KA20AHE3/73 uniquely combines AEC-Q101 qualification, 1500 W capability in an axial package, and ultra-low leakage - making it the only option qualified for under-hood 24 V system protection where reliability and thermal margin are non-negotiable.
Availability
1.5KA20AHE3/73 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive interfaces, and telecom power supply inputs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KA20AHE3/73 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA family was engineered specifically for AEC-Q101-compliant transient suppression in 12 V and 24 V automotive systems - emphasizing thermal robustness, surge endurance, and long-term parametric stability under vibration and thermal cycling.
FAQ
What is the exact breakdown voltage range for 1.5KA20AHE3/73?
The 1.5KA20AHE3/73 has a specified breakdown voltage (VBR) range of 19.0 V to 21.0 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage margin design in 24 V automotive systems.
Is 1.5KA20AHE3/73 qualified for automotive use?
Yes, the 1.5KA20AHE3/73 is AEC-Q101 qualified and designated as automotive grade (HE3 suffix). It undergoes rigorous stress testing including high-temperature reverse bias, temperature cycling, and surge endurance - meeting requirements for deployment in engine control, body electronics, and ADAS subsystems.
What is the maximum clamping voltage of 1.5KA20AHE3/73 under surge conditions?
The 1.5KA20AHE3/73 clamps to a maximum of 27.7 V when subjected to its rated peak pulse current of 54.2 A (10/1000 µs waveform). This clamping voltage defines the upper voltage limit imposed on protected circuits during transient events, ensuring downstream components remain within safe operating areas.
Does 1.5KA20AHE3/73 have unidirectional or bidirectional polarity?
The 1.5KA20AHE3/73 is unidirectional only, with cathode identified by a color band. It conducts surge current from cathode to anode during reverse-biased overvoltage events and blocks voltage up to 17.1 V in normal operation - ideal for DC supply rail and signal line protection where polarity is fixed.
What packaging and reel configuration is used for 1.5KA20AHE3/73?
The 1.5KA20AHE3/73 ships in 13" diameter paper tape and reel format with a base quantity of 1400 units per reel (package code 73). The axial leads are matte tin-plated and comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance standards.
1.5KA20AHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA20AHE3/73 FAQ
1.How can I place an order for 1.5KA20AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA20AHE3/73 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5KA20AHE3/73 reliable?
The price and inventory of 1.5KA20AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA20AHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA20AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA20AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA20AHE3/73?
1.5KA20AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA20AHE3/73 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5KA20AHE3/73?
For technical support, including 1.5KA20AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA20AHE3/73 requirements.
6.How does Aetrix verify that 1.5KA20AHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA20AHE3/73 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5KA20AHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA20AHE3/73?
All 1.5KA20AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA20AHE3/73, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5KA20AHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA20AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA20AHE3/73 Tags
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